<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .d1{
            background-color: rgba(0,255,255,0.8);
        }
        .d2{
            background-color: rgba(255,0,255,0.5);
        }
        .d3{
            background-color: rgba(255,255,255,0.6);
        }
        .d4{
            background-color: rgba(255,255,0,0.7);
        }
        .d5{
            background-color: rgba(255,0,0,0.3);
        }
        .d6{
            width: 200px;
            height: 300px;
            /*background-image: url("../day01/img/aa.jpg");*/
            background-image:linear-gradient(123deg,rebeccapurple,#11fba1,palevioletred);
        /*    deg 角度*/
        }
    </style>
</head>
<body>
<!--.d*5-->
<div class="d1">kono dio da</div>
<div class="d2">kono dio da</div>
<div class="d3">kono dio da</div>
<div class="d4">kono dio da</div>
<div class="d5">kono dio da</div>
<div class="d6"></div>
</body>
</html>